Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
  • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
  • F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe

Definitions

• the invention relates to a screw, in particular a high pressure fitting for the transmission of gaseous, liquid and / or solid media.
• Such a high-pressure screw connection is described for example in EP-A-0 753 698 for pressure medium lines or in WO 02/01105 for pipe fittings.
• Such high-pressure fittings with clamping rings are also the subject of US Patents 3,584,900 or 3,103,373, in particular the design of the clamping rings (cutting rings) is emphasized to ensure a secure fixation of the connected pipes and their leak-free seal.
• these pipe connections With increasing pressure values of more than 700 bar, however, these pipe connections are becoming increasingly sensitive to leaks, so that in general an escape of medium, for.
• hydraulic oil or pre-cooled hydrogen gas is to be expected. This could lead to accidents, in particular could be caused by leaks under pressure lines considerable damage.
• the cutting rings penetrating into the outer skin of the tubes considerably stress the tube, so that it can lead to a crack or even break in the case of alternating stresses (eg, even with slight tube vibrations).
• the invention is therefore an object of the invention to provide a screw, in particular a high-pressure fitting available, which avoids the disadvantages of the prior art.
• a high pressure fitting is to be made available, the easier Construction is improved safety, so that hazards or damage can be avoided.
• a screw connection in particular a high pressure fitting comprising at least one hollow body, in particular a tubular body which is at least partially surrounded by a sealing sleeve and characterized in that the sealing sleeve is integrally connected to the tubular body.
• a high pressure fitting for the transmission of gaseous and / or liquid fluids, in particular for refueling of vehicles comprising a housing with a fluid passage and a sealing cone and a tube inserted therein, the end surrounded by an at least partially conical sealing sleeve is, which is acted upon axially by a screw, provided, wherein a sealing sleeve completely pushed onto the tube and fixed to the tube end, in particular with a circumferential weld adjacent to the tube end is welded.
• the sealing sleeve is surrounded by an annular chamber, which opens into a vent hole.
• the sealing sleeve has an annular shoulder into which a sealing ring is inserted corresponding to the sealing cone of the housing.
• annular screw lock is provided between the sealing sleeve and nut, which consists in particular of two discs.
• the housing-side end of the screw nut surrounds the sealing sleeve and / or screw lock in the axial direction.
• the housing can be rectilinear, angled, formed as a tee or as a crosspiece.
• the sealing ring with conical outer shape of a pressure-resistant plastic in particular PEEK, but can also be made of non-ferrous metals such. As Al alloys, Monell, copper alloys or non-ferrous metal.
• sealing sleeve is pushed with a tight fit on the tube, in particular with a diameter tolerance of less than 1 mm, preferably ⁇ 0.1 mm.
• the sealing sleeve with the tube Due to the cohesive connection of the sealing sleeve with the tube, in contrast to the compounds in the prior art with cutting rings, a leak-free connection is achieved even at high pressures of more than 700 bar, in particular more than 1000 bar and even more than 4000 bar. Furthermore, the tubular body is relieved by the cohesive connection, in particular, no axial loads occur. Furthermore, a deformation of the tubular body, in particular of the tube is avoided and prevents detachment from the compound. In the cohesive connection, the permeation rate, i. H. the leakage rate essentially determined by the basic materials used of the tubular body and the sealing sleeve.
• Possible cohesive connection between the pressure sleeve and the tubular body are all possible cohesive connections, such as a solder joint, a welded joint, a
• Cohesive connections are characterized assume that the two connection partners are held together by atomic or molecular forces, and can be separated from each other only by destruction of the bonding agent.
• the integral connection between the sealing sleeve and the tubular body is produced by a welding process, in particular by laser welding.
• the sealing sleeve On the outside of the sealing sleeve, which is directed away from the tubular body, know the sealing sleeve a corrugation, in particular grooves. These grooves serve to hold a seal applied to the sealing sleeve, for example a sealing ring.
• the sealing ring preferably engages in a sealing cone of a housing partially enclosing the sealing sleeve and thus seals the sealing sleeve relative to the housing.
• the tubular body which transmits the gaseous, liquid and / or solid medium can have a fitting contour on the side facing away from the sealing sleeve.
• a flexible hose such as a hydraulic hose can be mounted.
• the screw connection comprises a housing, which has a fluid passage, and a sealing cone.
• the sealing sleeve with the tubular body, with which it is materially connected is introduced and of the housing at least partially enclosed.
• the housing has a sealing cone. Sealing cone and sealing sleeve with inserted tube are sealed together. This is preferably done with a sealing ring, which is applied to the sealing sleeve and engages in the sealing cone.
• the sealing sleeve may have a narrow conical region, which forms a metallic sealing surface with the sealing cone of the housing. By such a configuration, a metallic seal is also achieved when no sealing ring is present between the sealing sleeve and the housing.
• the introduction of the conical region in the sealing sleeve can be done either exciting or without cutting.
• the seal described above which can be applied to the sealing sleeve and inserted into the sealing cone of the housing, preferably has a Dichtmatehai, which is softer than the base material, that is, the material of the tubular body, or the housing.
• a sealing ring made of PEEK polyetheretherketone
• the geometry of the sealing ring is usually adapted to that of the housing. With the help of the sealing ring and / or the metallic seal, a sealing of the sealing sleeve relative to the housing is achieved.
• the application of the sealing ring on the sealing sleeve can be done by pressing, by a positive or cohesive connection, by spraying, vulcanizing, bonding or gluing.
• the screw connection comprises a clamping screw with which the housing is screwed to the sealing sleeve.
• the clamping screw provides a frictional connection between the tension screw, the securing element introduced between the tensioning screw and the sealing sleeve, and the sealing sleeve.
• materials for the clamping screw comes in particular stainless steel, as well as light, non-ferrous metals and plastics such.
• the machining of the clamping screw is done either by machining or by chipless deformation.
• a screw lock In order to prevent unfavorable mechanical loads, in particular vibrations, the loosening of the screwdriver, comprising presently tube, seal, sealing sleeve, clamping screw and lock washer, a screw lock can be provided, which preferably consists of two mutually movable disks.
• the housing has a vent hole or a notch, which is introduced into the thread of the housing part.
• Vent hole is also made it possible to make leakage measurements.
• Preferred materials for the housing are plaidmetallegerieungen and all metallic and non-metallic materials. Otherwise, all conceivable
• the screw connection according to the invention in particular high-pressure fitting is characterized by a particularly high level of safety and simple construction, since a simple connection is achieved by the proposed fixation of the sealing sleeve at the pipe end, so that hazards or damage can be excluded.
• the pipe is without Tension in the sealing sleeve out, so that voltage peaks is prevented and with the proposed high-pressure fitting can be safely and long term avoided that gas, liquid or solid can escape. This is particularly important for accident protection reasons, but also for environmental protection, so that no significant volume of media can be lost.
• the proposed gland is suitable for various connections, in particular for high-pressure systems / connections in vehicle construction, but also in industrial plants or for vehicle refueling.
• the screw, especially high-pressure fitting can be installed at any point of the piping in a compact manner and also have valves or filters adjacent to the screw.
• Fig. 1 shows a first embodiment of a high pressure fitting in
• a first embodiment of a screw, in particular a high-pressure fitting 1 is shown with a housing 2, wherein the right-hand end face with a dashed line shown medium passage 3 z. B. as
• Inlet serves and the left end face for the forwarding of the medium to be transferred via a tube 9 inserted therein, for example, to a working cylinder or pressure tank, not shown.
• a nut 6 is provided, which is screwed by a thread 6a and a screw lock 7 against the housing 2.
• Screw lock 7 is preferably made of two relative to each other movable disks, so that when vibrations (for example in a vehicle) a release can be reliably prevented.
• a sealing sleeve 4 is provided, into which the tube 9 is inserted for the continuation of the medium passage 3, which serves as a conduit for supply or discharge of the medium to be transferred.
• the housing 2 can in this case in adaptation to the medium to be transferred, in particular to the respective desired feed angle, passage cross sections, etc., for example, also cranked or angled or designed as a crosspiece.
• the screw connection according to the invention in particular high-pressure screw connection 1 for the transmission of gaseous, liquid and / or solid media is characterized in that the sealing sleeve 4 is fixed at the pipe end 9a, in particular by a cohesive connection.
• the sealing sleeve is welded to a peripheral weld 4b at the tube end 9a, ie close to the frontal entry to the medium passage 3.
• the sealing sleeve is not only partially, but completely pushed onto the tube 9.
• the sealing sleeve 4 has a narrow conical region 4c, which forms a metallic sealing surface with the sealing cone 2a.
• the sealing sleeve 4 is surrounded by an annular chamber 8, which opens into a vent hole 8a.
• the sealing sleeve 4 has an annular shoulder 4a, into which a sealing ring 5 is inserted corresponding to the sealing cone 2a of the housing 2.
• the sealing ring 5 with its conical outer shape made of PEEK (polyetheretherketone), since this resistant material offers high media resistance and tightness even at extreme temperatures below zero.
• the housing-side end of the nut 6, the sealing sleeve 4 and / or screw lock 7 engages in the axial direction.
• This will be the larger diameter end of the sealing sleeve 4 encompassed and stabilized.
• the weld 4b is not subjected to bending stresses at the pipe end 9a due to the exact guidance in the screw nut 6 and in particular because of the exact fit (tight tolerance) in the sealing sleeve 4. Therefore, a relatively "fine" weld 4b already suffices for secure fixation.
• FIGS. 2a to 2c show an alternative embodiment of the invention.
• the same components as in Figure 1 are assigned by 100 increased reference numerals.
• a further embodiment of a screw 101, in particular a high-pressure fitting with a housing 102 is shown, wherein the housing has fluid passage 103.
• the recessed into the housing 102 fluid passage 103 is used for. B. as an inlet for a fluid that is passed into the tube 109.
• a sealing sleeve 104 is slipped onto the tube 109 and, in accordance with the invention, is connected in a materially bonded manner, for example with a weld seam 104b at the tube end 109a.
• the sealing sleeve furthermore has a conical region 104c, which forms a metallic sealing surface in the region 103 with the sealing cone 102a embedded in the housing.
• the sealing sleeve has a region 107, which may, for example, have a corrugation (not shown).
• a sealing material is applied to the sealing cone, for example by pressing or shrinking.
• the sealing material is preferably a sealing ring 105, which may consist of a PEEK (polyetheretherketone).
• the sealing ring 105 additionally seals the sealing sleeve with respect to the housing.
• a screw nut 106 is provided, which is preferably as Clamping screw is designed.
• the clamping screw is connected via a thread 111 a, which in the present case engages in an external thread of the housing 102 in contrast to the embodiment according to FIG. 1, and a screw lock 111 is screwed against the housing 102.
• the screw 107 preferably consists of two mutually relatively movable discs, so that when a vibration
• the embodiment according to FIG. 2 a - c has a fitting contour 120 with respect to the embodiment shown in FIG. 1 on the side of the tube 109 facing away from the housing.
• the fitting contour comprises a stop 121 and a profiling 130.
• a line for example a plastic line, can be pushed onto the profiling and pressed with the fitting. This makes it possible to connect to the fitting according to the invention a flexible line, for. B. as described above by compression.
• FIG. 2b shows a three-dimensional view of a connection according to FIG. 2a and in FIG. 2c a plan view.
• the same components, as in the longitudinal section along the line A - A as in Figure 2a are assigned the same reference numerals.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Joints With Pressure Members (AREA)
• Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
• Gasket Seals (AREA)
• Pressure Vessels And Lids Thereof (AREA)

Priority Applications (9)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40490617

Family Applications (1)

Country Status (11)

Cited By (3)

Families Citing this family (15)

Citations (8)

Family Cites Families (12)

• 2008
  • 2008-02-15 DE DE202008002211U patent/DE202008002211U1/de not_active Expired - Lifetime
• 2009
  • 2009-02-12 CN CN200980101307.8A patent/CN101896756B/zh not_active Expired - Fee Related
  • 2009-02-12 EA EA201070962A patent/EA018903B1/ru not_active IP Right Cessation
  • 2009-02-12 AU AU2009214334A patent/AU2009214334A1/en not_active Abandoned
  • 2009-02-12 WO PCT/EP2009/000957 patent/WO2009100898A1/de active Application Filing
  • 2009-02-12 KR KR1020107016544A patent/KR101194266B1/ko not_active IP Right Cessation
  • 2009-02-12 JP JP2010546258A patent/JP5667449B2/ja not_active Expired - Fee Related
  • 2009-02-12 ES ES09710453T patent/ES2408960T3/es active Active
  • 2009-02-12 US US12/867,853 patent/US20110006519A1/en not_active Abandoned
  • 2009-02-12 EP EP09710453.3A patent/EP2257726B1/de not_active Not-in-force
  • 2009-02-12 CA CA2707000A patent/CA2707000C/en not_active Expired - Fee Related

Patent Citations (8)

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